One of my favorite movies of all time is Primer. If you haven't seen it, you need to watch it. 20 times. It will change your life.

In short, it deals with Time Travel, paradoxes, etc. and it's done in a very unique and realistic way.

If you HAVE read it, can you recommend any good books that are similar. I saw that Shane Carruth said he read "our elegant universe" in preparing to make the film - but that's more technical reading I think.

I've already read a doorway into summer by Robert Heinlein which was a great complimentary read, but need more recommendations.